Dynamic Collision Distance Control for Vehicle Back Doors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle back door control systems may delay stopping the opening or closing operation when an obstacle is detected, leading to potential collisions with moving objects, such as vehicle users, due to the use of a single collision determination distance that does not account for the object's movement.
Innovation Solution
A control device that includes a distance detection unit and a control unit capable of distinguishing between stationary and moving objects, setting a longer collision determination distance for moving objects to prevent collisions by continuing or stopping the operation based on the object's distance and movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single collision determination distance is used for all detected objects, then the control system is simple, but moving objects cannot be stopped in time leading to collision
Solution Approach 1:
The collision determination distance is made dynamic by adjusting it based on the movement state of the detected object. When a moving object is detected, a longer second collision determination distance is used; when a stationary object is detected, a shorter first collision determination distance is used. This dynamic adjustment ensures reliable collision prevention for moving objects while maintaining system simplicity through conditional logic rather than complex hardware.
Solution Approach 2:
The collision determination distance parameter is changed based on the movement state of the detected object. The system switches between two parameter values (first collision determination distance for stationary objects, second collision determination distance for moving objects). This parameter change approach allows the system to adapt to different scenarios without increasing hardware complexity, resolving the contradiction between reliability and device complexity.
2Reliability
If the motor stops immediately when an obstacle is detected, then collision risk is reduced, but normal operation is interrupted for stationary objects
Solution Approach 1:
Different stopping behaviors are applied to different types of detected objects. For stationary objects, the motor continues operating when the detection distance exceeds the first collision determination distance, maintaining productivity. For moving objects, the motor stops when the detection distance exceeds the longer second collision determination distance, ensuring safety. This local quality differentiation resolves the contradiction between safety and operational efficiency.
Solution Approach 2:
The stopping decision is made dynamic based on the movement state of the detected object. The system continuously monitors whether the object is moving or stationary and adjusts the collision determination distance accordingly. This dynamic approach allows the system to maintain high productivity for stationary objects while ensuring safety for moving objects, resolving the contradiction between safety and productivity.
3Reliability
If a longer collision determination distance is used, then moving objects can be stopped in time, but stationary objects may cause unnecessary stops
Solution Approach 1:
The collision determination distance is dynamically adjusted based on the movement state of the detected object. A longer second collision determination distance is used for moving objects to ensure timely stopping and collision prevention. A shorter first collision determination distance is used for stationary objects to avoid unnecessary stops and maintain operational continuity. This dynamic differentiation resolves the contradiction between collision prevention for moving objects and operation continuity.
Solution Approach 2:
The collision determination distance parameter is changed based on the movement state detection. When a moving object is detected, the parameter switches to the longer second collision determination distance for safe stopping. When a stationary object is detected, the parameter uses the shorter first collision determination distance to maintain operational continuity. This parameter change strategy resolves the contradiction between safety for moving objects and productivity for stationary objects.
Data Source
AI summary
An opening and closing body control device includes a distance detection unit that detects a detection distance, which is a distance to a detected object around an opening and closing body, and a control unit. When a start command is input, the control unit determines whether the detected object is a moving object or a stationary object, sets a first or second collision determination distance as a collision determination distance depending on whether the detected object is moving or stationary. When the detection distance is smaller than the collision determination distance, the control unit controls the drive unit to stop operation of the opening and closing body.